Squeeze's initscripts use the kernel default (50% of your RAM). unstable's
initscripts will set it to 20% of your RAM. If it is not live-config which
is forcing it to 32MiB, please track down whatever is doing it, and reassign
the bug...

live-config does not do anything with SHM size, nor should it as far as
i can see. reassigning back to general until someone can find the real
cause for it.